I forwarded a combined leave request to my boss at work for several occasions at once. For instance, I requested for a casual leave on Friday, 6th July and Friday, 13th July and additionally a long planned leave from Wednesday, 25th July till Friday, 24th August.

In my understanding, it should still be leave, but somehow leaves started sounding more correct as the reference was made to several instances of my leave (M-W illustrates an example and uses it for plural and wiktionary too). Is there a word "leaves" for multiple instances of leave if combined? Please quote a reference and any other usage.

Now another question popped up in my head- why is it "Leave(s) of absence" when leave means absence in itself?
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Fr0zenFyrJun 29 '12 at 20:37

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However your boss is a good person in comparison with mine, who doesn't grant me leave as he should do. +1 to the interesting question.
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user19148Jun 29 '12 at 20:46

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Your understanding is correct. The reply has used the word "leave" incorrectly. It's also poorly punctuated. I would have written this. "Approved; the leave you requested is granted."
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user16269Jun 29 '12 at 22:33

@David: Thanks for the response. Is there any reference where it says "leaves" is incorrect? I'm sure the punctuation and grammar are terrible in the approval.
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Fr0zenFyrJul 2 '12 at 6:21

@Carlo_R.: :D Lucky to have a boss like him. :P
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Fr0zenFyrJul 2 '12 at 6:46

What about the usage of "leave" alone as in my example? Can i still use noun-countable ("leaves")?
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Fr0zenFyrJul 2 '12 at 6:57

So that makes "leaves are granted" acceptable, that is definitely a new thing for me. Can you please quote any reference.
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Fr0zenFyrJul 2 '12 at 7:02

"Leave" is simply short for "leave of absence"? They are not the same as I see them. "leave" is taking off and "leave of absence" is more of Permission as @Andrew suggests above.
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Fr0zenFyrJul 2 '12 at 8:39

Thanks Jasper. I'll wait for other people to post more answers. If i don't find any better explanation, I'll pretty much buy this.
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Fr0zenFyrJul 2 '12 at 9:00